PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS
PNaCl: Update LLVM revision in pnacl/COMPONENT_REVISIONS

This pulls in the following LLVM change:

6bff3c6: (dschuff@chromium.org) PNaCl translator: combine insertelement / extractelement patterns generated by the toolchain into shufflevector shufflevector isn't part of the PNaCl ABI, insertelement / extractelement sequences are instead generated, but they help in generating higher performance code. This pass recognizes the patterns at translation time and reconstructs shufflevector, allowing the generated code to perform better.

BUG= http://code.google.com/p/nativeclient/issues/detail?id=2205
TBR=jvoung@chromium.org
TEST= PNaCl toolchain trybots

Review URL: https://codereview.chromium.org/331633007

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@13366 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client